At what temperature will the resistance of a copper wire become three times its value at $0\,^oC$ ................. $^oC$ (Temperature coefficient of resistance for copper = $4 × 10^{-3} \,per\, \,^oC$ )
Medium
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By using ${R_t} = {R_0}(1 + \alpha t)$
$3 \times {R_0} = {R_0}(1 + 4 \times {10^{ - 3}}t)$$ \Rightarrow \,\,t = {500\,^o}C$.
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